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Chemistry

Chemistry
The percentage of Nitrogen in Air is

0.03
78.03
85.02
0.94

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Chemistry
Silk fibre chemically is :

Cellulose
Fat
Protein
Carbohydrate

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Chemistry
Charcoal is used in water treatment as a/an

Adsorbent
Solvent
Absorbent
Coagulant

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Chemistry
The monomer of polythene is

ethyl alcohol
ethylene
vinyl chloride
None of these

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Chemistry
The chemical name of quartz is

Sodium phosphate
Calcium phosphate
Calcium oxide
Sodium silicate

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Chemistry
In vulcanisation process, rubber can be hardened by adding

Alcohol
Nitrogen
Sulphur
Silicon

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